Timestream Navigator [Rivals of Ixalan Prerelease Promos] HarperPrism Book Promos whenever either of those creatures

whenever either of those creatures deals combat damage

Set: Neo Discovery 1st Edition Type: Colorless Rarity: Uncommon

Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step

you may search your library for an Elemental card

where X is the number of untapped lands they controlled at the beginning of this turn

Timestream Navigator [Rivals of Ixalan Prerelease Promos] HarperPrism Book Promos whenever either of those creaturesSet: Rivals of Ixalan Prerelease Promos Type: Creature Human Pirate Wizard Rarity: Mythic Cost: {1}{U} Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) {2}{U}{U}, {T}, Put Timestream Navigator on the bottom of its owner's library: Take an extra turn after this one. Activate only if you have the city's blessing.